Pen



FIG. 1 is a perspective view of a pen showing my new design.

FIG. 2 is a front elevation view of the pen of FIG. 1.

FIG. 3 is a rear elevation view of the pen of FIG. 1.

FIG. 4 is a left side elevation view of the pen of FIG. 1.

FIG. 5 is a right side elevation view of the pen of FIG. 1.

FIG. 6 is a top plan view of the pen of FIG. 1; and,

FIG. 7 is a bottom plan view of the pen of FIG. 1.

The broken lines in the drawings depict portions of the pen that form nopart of the claimed design.

CLAIM The ornamental design for a pen, as shown and described.